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Re: [Amps] Quiet Cooling

To: <AMPS@CONTESTING.COM>, "Harold B. Mandel" <ka1xo@juno.com>
Subject: Re: [Amps] Quiet Cooling
From: "K7RDX" <k7rdx@earthlink.net>
Date: Mon, 6 Sep 2004 12:17:30 -0700
List-post: <mailto:amps@contesting.com>
Great idea (Been used by many) but much of the noise generated cooling
tubes/tank circuits/transformers is wind noise....Perhaps an exit for heated
air would solve this problem for some of the commercial amps built for hams
that sound like a turbo prop airplane.I use a semi-enclosed area on one side
of my shack thats ventilated inside/outside for my HB amps and I don`t have
a noise problem....Jim.
----- Original Message -----
From: "Harold B. Mandel" <ka1xo@juno.com>
To: <AMPS@CONTESTING.COM>
Sent: Monday, September 06, 2004 11:16 AM
Subject: [Amps] Quiet Cooling


> Sirs,
>
> The thread about quiet cooling of amplifiers made me think back to
> my college days when among studies of alcoholic consumption,
> music appreciation and techniques for attracting YL's I studied
> pipe organ construction and repair.
>
> The musicians do not want to hear the air blower mechanism when they're
> keyboarding and neither does any audience or congregation.
>
> What pipe organ builders do is to isolate the blower in another room
> and use a "wind-column" to supply the wind chests under the pipes
> with pressurized air.
>
> Could not this technique be applied to amplifiers? Remove the noisy
> blower from the shack and connect flexible hose to a clamped fitting
> on any equipment needing cooling. A much beefier fan could be
> employed than would fashionably fit on a rear apron, and a
> manifold system could be arranged so that more than one piece of
> gear could benefit
>
> Hal
> W4HBM
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